Record details

Title
    Source mechanisms of micro-earthquakes induced in a fluid injection experiment at the HDR site Soultz-sous-For?ts (Alsace) in 2003 and their temporal and spatial variations
Author
    Dorbath, L.
    Horálek, Josef
    Jechumtálová, Zuzana
    Šílený, Jan
Language
    anglicky
Publication type
    článek v odborném periodiku
Source title - serial
    Geophysical Journal International
Vol./nr.
    Roč. 181, č. 3
Pages
    s. 1547-1565
Year
    2010
Notes
    Projekt: GA205/09/0724, GA ČR3cav_un_auth*0252832
    Projekt: IAA300120911, GA AV ČR3cav_un_auth*0252829
    Projekt: MTKI-CT-2004-517242, EU, XE3cav_un_auth*0250446
    Rozsah: 19 s.
    Výzkumný záměr: CEZ:AV0Z30120515
Subject category
    controlled source seismology
    downhole methods
    earthquake source observations
    fracture and flow
    hydrogeophysics
Keyword
    2003
    Alsace
    Experiment
    Fluid
    HDR
    Induced
    Injection
    Mechanisms
    Micro-earthquakes
    Site
    Soultz-sous-For?ts
    Source
    Spatial
    Temporal
    Variations
Abstract (in english)
   We have inverted the peak amplitudes of direct P waves of 45 micro-earthquakes with magnitudes between M = 1.4 and 2.9, which occurred during and after the 2003 massive fluid injection in the GPK3 borehole of the Soultz-sous-Forets Hot Dry Rock facility. These events were recorded by a surface seismic network of 15 stations operated by the Ecole et Observatoire des Sciences de la Terre, University of Strasbourg. The unconstrained moment tensor (MT) expression of the mechanism was applied, allowing the description of a general system of dipoles, that is, both double-couple (DC) and non-DC sources, as tensile fractures. The mechanisms of all but one event are dominantly DCs with a few per cent additional components at the most.
Contributor
    AV ČR Brno, Geofyzikální ústav
Contributor code
    AV ČR, GFÚ
Source format
    U
Import date
    9. 12. 2013